From: Eduard Hasenleithner <eduardh@aon.at>
To: linux-kernel@vger.kernel.org
Subject: DVD blockdevice buffers
Date: Fri, 18 May 2001 21:02:26 +0200 [thread overview]
Message-ID: <20010518210226.A7147@moserv.hasi> (raw)
I have a problem with the buffering mechanism of my blockdevice,
namely a ide_scsi DVD-ROM drive. After inserting a DVD and reading
data linearly from the DVD, an excessive amount of buffer memory gets
allocated.
This can easily be reproduced with
cat /dev/sr0 > /dev/null
Remember, nearly the same task is carried out when playing a DVD.
As a result the system performance goes down. I'm still able to use
my applications, but es every single piece of unused memory is swapped
out, and swapping in costs a certain amount of time.
So, what wents wrong? I tried to find some information on this with
google and geocrawler, but i didn't have a success :(
Kernel: linux-2.4.4
hoping for some tips ...
--
Eduard Hasenleithner
student of
Salzburg University of Applied Sciences and Technologies
next reply other threads:[~2001-05-18 19:22 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-05-18 19:02 Eduard Hasenleithner [this message]
2001-05-18 19:25 ` DVD blockdevice buffers Jens Axboe
2001-05-18 19:59 ` Eduard Hasenleithner
2001-05-20 2:36 ` Linus Torvalds
2001-05-23 17:34 ` Stephen C. Tweedie
2001-05-23 18:12 ` Linus Torvalds
2001-05-23 19:57 ` Stephen C. Tweedie
2001-05-23 20:01 ` Linus Torvalds
2001-05-23 20:40 ` Jeff Garzik
2001-05-23 22:32 ` Andrea Arcangeli
2001-05-25 20:12 ` blkdev-pagecache-2 [was Re: DVD blockdevice buffers] Andrea Arcangeli
2001-05-25 20:15 ` Andrea Arcangeli
2001-05-23 22:09 ` DVD blockdevice buffers Andrea Arcangeli
2001-05-23 22:13 ` Alexander Viro
2001-05-23 22:24 ` Andrea Arcangeli
2001-05-24 11:36 ` Stephen C. Tweedie
2001-05-25 15:09 ` Eric W. Biederman
2001-05-25 15:45 ` Stephen C. Tweedie
2001-05-25 17:16 ` Linus Torvalds
2001-05-25 17:40 ` Alexander Viro
2001-05-25 18:05 ` Linus Torvalds
2001-05-25 18:24 ` Alexander Viro
2001-05-25 19:02 ` Stephen C. Tweedie
2001-05-27 6:38 ` Pavel Machek
2001-05-25 21:07 ` Eric W. Biederman
2001-05-25 21:18 ` Linus Torvalds
2001-05-25 22:31 ` Eric W. Biederman
-- strict thread matches above, loose matches on Subject: below --
2001-05-19 18:16 Adam Schrotenboer
2001-05-19 22:56 ` Jens Axboe
2001-05-20 1:55 ` Adam Schrotenboer
2001-05-21 15:44 ` Adam Schrotenboer
2001-05-21 15:47 ` Jens Axboe
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